seabed

noun

sea·​bed ˈsē-ˌbed 

variants or less commonly sea bed

plural seabeds also sea beds

: the floor of a sea or ocean : seafloor

This atoll is the summit of an undersea volcano that rises from the seabed 10,000 feet below the surface.

—Kennedy Warne

Examples of seabed in a Sentence

Recent Examples on the Web

But the rhenium that was bound to the organic carbon gets washed through rivers into the ocean, where it is incorporated into new seabed sediments. — Howard Lee, ArsTechnica, 26 June 2026

The hull has been optimized specifically for high-precision seabed mapping—one of the most important tools in modern oceanography—and, while not the sexiest feature, RV11000 will also carry the largest battery installation ever fitted on a ship. — Dea Jusufi, Forbes.com, 13 June 2026

Networks of green energy cables carrying electricity are also starting to sprawl across the world’s seabeds. — Tim Lister, CNN Money, 31 May 2026

Undersea mudslides occasionally damage cables, too, and future seabed mining could eventually add another hazard. — Ramin Skibba, Scientific American, 27 May 2026

Word History

First Known Use

1838, in the meaning defined above

Phrases Containing seabed

• the seabed

Rhymes for seabed

• abed
• ahead
• beachhead
• bedspread
• bedstead
• behead
• blackhead
• blockhead
• bloodshed
• bowhead
• breastfed
• bridgehead

Kids Definition

seabed

noun

sea·​bed ˈsē-ˌbed 

: the floor of a sea or ocean